Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc7d3bdc0a1f7d33…

MALICIOUS

PDF

70.7 KB Created: 2021-06-04 04:26:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97b56ce1343b46a9111d1b41736b0c80 SHA-1: 594af813a8c8cc0c31575fab3d313738f90d82d4 SHA-256: cc7d3bdc0a1f7d3321739843d05c6d06364bd8bcfd17c91fa219b622c1f46189
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by multiple heuristics, including a critical ClamAV detection and an ML classifier. It contains numerous embedded URLs, with one prominent URL leading to a link farm designed to redirect users. The document body, though heavily obfuscated, appears to be a lure related to software downloads, suggesting a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9874

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://archism.ru/pbw?utm_term=can+i+download+roblox+on+macbook+air
    • https://cdn-cms.f-static.net/uploads/4457296/normal_604bc394d0ba3.pdf
    • https://misetibu.weebly.com/uploads/1/3/1/4/131438078/rofujija-resab-fafewazajamu.pdf
    • https://rezukozivir.weebly.com/uploads/1/3/4/6/134631959/8072361.pdf
    • https://static.s123-cdn-static.com/uploads/4413968/normal_5ffa77353379f.pdf
    • https://static.s123-cdn-static-d.com/uploads/4530910/normal_60b275aa1bad1.pdf
    • https://static.s123-cdn-static.com/uploads/4484835/normal_5ff56eb12d602.pdf
    • https://watuxiso.weebly.com/uploads/1/3/2/7/132740831/7188943.pdf
    • https://bapumelu.weebly.com/uploads/1/3/7/5/137502396/d8bd43b69f8.pdf
    • https://jozipomona.weebly.com/uploads/1/3/4/4/134479443/25fe394.pdf
    • https://cdn-cms.f-static.net/uploads/4484835/normal_604f0d361c73c.pdf
    • https://wobakasufafe.weebly.com/uploads/1/3/2/6/132682589/bagudaxiwizijades.pdf
    • https://gisidamuxifa.weebly.com/uploads/1/3/0/7/130775495/kugopisagaw.pdf
    • https://static.s123-cdn-static.com/uploads/4390324/normal_60078b5f5bab1.pdf
    • https://cdn-cms.f-static.net/uploads/4459341/normal_6019c6f024cb5.pdf
    • https://cdn-cms.f-static.net/uploads/4444370/normal_6011d1a11a0b5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jowenoxo.pbworks.com/w/file/fetch/144548814/zekevejisoka.pdf
    • http://lopofemusun.pbworks.com/w/file/fetch/144504849/gowaxijopiwaj.pdf
    • https://uploads.strikinglycdn.com/files/912624cb-faf5-4539-877a-00978ed2763f/can_i_use_a_wireless_keyboard_with_my_samsung_tablet.pdf
    • https://uploads.strikinglycdn.com/files/52406197-0945-4108-8881-1e4758b9deae/what_are_the_44_phonetic_sounds.pdf
    • http://pafunanukexe.pbworks.com/w/file/fetch/144584136/rusya_na_kar_soniya_mp3_song_download_mr_jatt.pdf
    • http://xalomuzavege.pbworks.com/w/file/fetch/144438321/how_to_cook_a_petite_sirloin_roast_in_the_oven.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9f5.bin
5f8751f072fb846356f4b7229db056448d49fd28f4e47015bc638007c4f0d1a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F5 5176 bytes
font_01_sfnt_off0000fb8d.bin
1ce94ff72ccdab912c7f652434f9743b33694c62b410ee025724148dba71cb56		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB8D 9996 bytes

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